| Entry | 6 months | Entry ➔ 6 months ES | p-value | ||
---|---|---|---|---|---|---|
 | Mean | SD | Mean | SD | ||
NASS | ||||||
 pain+disability | 2.76 | 0.73 | 2.35 | 0.76 | 0.56 | < 0.001 |
 pain | 4.28 | 1.12 | 3.32 | 1.30 | 0.86 | < 0.001 |
 disability | 2.37 | 0.75 | 2.11 | 0.79 | 0.35 | < 0.001 |
SF-36 mental health | 66.4 | 18.9 | 69.8 | 16.6 | 0.18 | 0.033 |